Pump



1945- H. THORPE-WOODS 2,381,628

PUMP 7 Filed April 24, 1942 3 s Sheets-Sheet 1 1477' ORA/E y 1945; THORPE-WOODS 2,381,623

PUMP

Filed April 24,. 1942 3 Sl 1eets-Sheet 2.

HTTM Y g 7, 1945- H. THORPE-WOODS- PUMP Filed April 24, 1942 3 Sheets-Sheet 3 I /yE/VTUR w M. fl H Patented Aug. 7, 1945 to International Marine Radio Company Limited. London, Englandl Application April 24, 1942,

Serial No. 440.284

In Great Britain May 19, 1941 1 Claim. (01. 103-202) This invention relates to rotary or semi-rotary. pumps of the kind comprising a casing and removable cover enclosing the operative parts such as a rotatable diaphragm or the like.

An object of the invention is to provide a pump of the above kind which is particularly adapted for the use of shipwrecked mariners in ships life-boats by so constructing the pump as to give a simple form of access to the operative mechanism for the purpose of cleaning or clearing obstructions without the use of separate tools such as spanners or other dismantling devices in consideration of the then physical and mental condition of the operator due to possible exposure.

According to the present invention there is provided a rotary or semi-rotary pump comprising a casing and a removable cover plate enclosing the operative parts, which is characterised in this that the cover plate is secured to the casing by a quick-release coupling whereby the pump can be quickly and easily opened up for cleaning or inspection by a partial turn of the cover plate.

Preferably according to the invention the casing and cover plate are provided with a plurality of co-operating wedge-faced projections and recesses forming ramps which are so disposed that a partial turn of the cover plate in one direction locks it in the casing in a leak-proof manner, whereas a partial turn in the opposite direction frees the cover plate from the casing and allows access to the interior of the pump.

The cover plate may be provided with projecting studs or a hand lever whereby it may be readily rotated for removal and if desired locking means may be provided to lock the cover plate against accidental rotation in the casing.

The above and other features of the invention will be better understood by reference to the accompanying drawings, in which Fig. l is a front elevation of one form of pump in accordance with the invention;

Fig. 2 is a sectional side elevation thereof;

Fig. 2A is a detail plan view of the two-way outlet valve shown in Figs. 1 and 2.

Fig. 3 is a detail sectional view of the pump casing;

Fig. 4 is a detail inner view of the cover plate;

Fig. 5 is a side view thereof;

Fig. 6 is a sectional elevation of a modified form of pump incorporating the invention;

Fig. 7 is a front view thereof; and

Fig. 8 is a plan view of the pump.

The pump casing l is in the form of an openended cylinder having an outwardly-directed flang 2 forming a seating for the coverplate 3 and an inwardly-directed lip portion 4 which is interrupted at intervals to provide a plurality of recesses 5 for receiving corresponding projections 6,Fig. 4, on the cover plate. The inner surfaces of the lip portions 4 are inclined as clearly shown in Fig.3 to forma' series of ramps and the projections 6 on the cover plate} are1co'rrespondingly inclined as clearly hown in Fig. 5 to co-operate therewith so that when the one is introduced into the other a partialturn of 'the cover plate will lo'ckboth firmly and without leak, the inner edge of the cover plate-being forced into tight contact with the seating 2 of the casing. The cover plate is provided with a pair of projecting bosses 1 whereby it may be readily rotated by means of a lever inserted between them. The cover plate is provided with a central boss 8 which forms a support for the pump spindle 9.

The pump mechanism is not shown, but may be of any known type, and the casing is provided with inlet and outlet bosses Ill and I I. The outlet boss H is preferably provided with two branch pipes 24 and 25, 24 being for the attachment of the outboard delivery hose, and 25 for the attachment of a supplementary fire, or other service hose which may be fitted with a spray. The boss ll carries within it the two-way valve 26 operated by the lever 21 whose movement is restricted by the stops 28 and 29 (Fig. 2A) so that either delivery or spray hose may be used as desired. To prevent leakage the washer 30 of compressible material is fitted between the boss H and the valve 26, the action being such that when the valve 26 is rotated by the lever 21, a slight screwing or unscrewing motion takes place. but owin to the comparative fineness of the thread this up-and-down movement is hardly noticeable, thus providing a device held together by a simple means without further fitting. Should it be necesary to clear a stoppage in the valve, the split pin 3| is removed by pulling on the ring 32 which frees the lever and enables it to be pivoted upon the hinge-pin 33 fixed in the lug 34 on the valve 26 so as to clear the stops 28 and 29 and so unscrew the valve completely. The replacement is only a reversal of this function, and the split pin replaced in its original position.

Referring now to Figs. 6, 7 and 8, the arrangement of the cover plate is similar to that already described, but it will be seen that in this modification the pump pindle 9 projects through the cover plate and removal of the cover plate To enable the pump to be fixed to either a.

vertical or horizontal structure, a dual-purpose clamp I5 is provided and hinged to the casing by means of a pin I6 passing through adjacent lugs formed upon the casing and clamp, and

operated by means of a single clamping screw l1 co-acting with the upper part of the casing, thehorizontal clamp effect being obtained through the medium of opposing jaws l8, l9, and the vertical clamp effect being obtained through the medium of the opposing jaws 20,. 21. The jaws l9 and 2| are provided-with fixed-lugsprojecting from the pump casing. and it will be seen-that when the clamp screw I l isoperated. the lever I5 is rotated about the pin I6 to forcethe movablejaws-18- and 20 respectively towards. their correspondingsflxed jaws l9 and-2|, and so to grip the thwart or gunwale indicated-respectively at 22 and 2.3.

What is claimed is: In a pump casing? structure-ofthe type-vde-: scribed, comprising a casing adapted for enclosing and: providing bearings for a pump imecha-i formed at the outer edge of said casing beyond and partly overlying said cover seat but in spaced relation thereto, said flange being formed with a series of uniformly spaced recesses, a series of "projections formed at the edge of said cover plate corresponding to said recesses and adapted to be received thereby when the cover is placed in position,. a series of curbed wedge-shaped members formed on said cover projections on the surface'opposite that engaging said seat, a similar series of complementary wedge-shaped members formed on said flange between said recesses whereby when said cover is placed in position over said seat, a turning movement imparted thereto will cause the engagement of the complementary wedge-shaped. members securin the cover firmly against theseat in said casing and a pairof axially extended bosses provided on the outer surface of the cover and spaced at opposite sides of. the axis of rotation of 'the cover to facilitate obtaining leverage thereon for quick cover removal. I

THORPE-WOODS. 

